established · 0.7

Extensions

Score 27.5 / 100 97 providers 112 APIs Search apis.io →
Variants seen in the corpus: Extensionsextensions

Providers using this tag (97)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Exemplar 9 Complete, well-documented, and agent-ready
Strong 13 Solid coverage with minor gaps
Developing 25 Usable, with meaningful gaps to close
DroneDeployDronesReality CaptureMappingPhotogrammetry3 APIs54.2AWS Lambda12 APIs52.7Azure Virtual MachinesCloud ComputingComputeInfrastructure-as-a-ServiceInfrastructure10 APIs52.7BrowserbaseHeadless BrowserBrowser InfrastructureWeb AutomationAI Agents4 APIs52.4KernelCompanyBrowser AutomationWeb AgentsBrowser Infrastructure22 APIs51.3SAP BI ToolsAnalyticsBusiness IntelligenceData VisualizationReporting26 APIs49.9Adobe Creative CloudAi MlCloudCreativeDesign24 APIs49.7KnosticCompanySecurityArtificial IntelligenceAI Agents4 APIs49.7Anchor BrowserBrowser InfrastructureAI AgentsCloud BrowserBrowser Automation20 APIs47.1Adobe IllustratorCreative CloudDesignIllustratorVector Graphics11 APIs46.3DataikuAnalyticsArtificial IntelligenceData PlatformData Science34 APIs45.8LambdaTestTestingCross-Browser TestingSeleniumCypress20 APIs45.5Workday ExtendAutomationCustom ApplicationsEnterprise16 APIs45.1TwitchEntertainmentGamingLive VideoStreaming43 APIs44.9MakeAutomationIntegrationiPaaSNo-Code8 APIs42.9commercetoolsCommerceComposable CommerceE-CommerceGraphQL19 APIs42.4KernelAgentsArtificial IntelligenceBrowser AutomationBrowsers22 APIs41.6Google ChromeBrowserChrome ExtensionsDeveloper ToolsWeb Platform15 APIs41.4DocupilotDocument GenerationPDF GenerationDocument AutomationTemplate Engine40 APIs41.3LookerAnalyticsBI PlatformBusiness IntelligenceData Analytics10 APIs41.3Zoho CliqMessagingTeam CollaborationChatBots22 APIs41.2MedusaCommerceHeadlessE-CommerceOpen-Source17 APIs40.7OpenShiftCI/CDCloud-NativeContainersDevOps31 APIs40.2Microsoft EdgeBrowserChromiumDeveloper ToolsEdge8 APIs39.8VS Code MarketplaceDeveloper ToolsIDEMicrosoft3 APIs39.8
Thin 34 Limited public surface area
Tableau DesktopAnalyticsBusiness IntelligenceData VisualizationDesktop Application12 APIs38.8PagerDutyAlertingDevOpsIncident ManagementOn-Call Management38 APIs38.5automation-anywhere22 APIs37.9CodaficationInsuranceAustraliaInsurtechClaims1 API37.6SAP AribaB2BContract ManagementProcurementSourcing78 APIs37.4EnvoyCloud-NativeLoad BalancingProxyService Mesh15 APIs37.3JupyterLabData ScienceIDEInteractive Computing7 APIs37.2Qlik69 APIs36.6TYPO3CMSContent ManagementEnterprisePHP6 APIs36.6HelmChartsCloud-NativeContainer OrchestrationDevOps10 APIs36.4Microsoft SharePointCollaborationContent ManagementMicrosoftMicrosoft-36510 APIs36.1trello16 APIs35.6ManifoldNFTCreator ToolsSmart ContractsBlockchain7 APIs35.3Windstream HoldingsBroadbandContact CenterManaged ServiceNetwork Communications9 APIs35.3KittlCompanyDesignGraphic DesignCreative Tools1 API35.2PorterCloud-NativeCNABDevOpsKubernetes7 APIs34.8fly-io9 APIs33.7Microsoft Office APIsCollaborationDocumentsMicrosoftOffice4 APIs33.3craftCompanyConsumerProductivityNotes2 APIs33.2Microsoft Excel (Advanced)AutomationBusiness IntelligenceData AnalysisOffice14 APIs33.2Eclipse FoundationEclipse FoundationFoundationOpen-SourceStandards13 APIs33.0MATLABData AnalysisEngineeringMachine-LearningNumerical Analysis13 APIs32.6LucidchartProductivityDiagrammingVisualizationVisual Workspace9 APIs32.5freshdesk17 APIs31.6freshworks44 APIs31.6PenpotDesignPrototypingOpen-SourceSelf-Hosted139 APIs31.6ObsidianProductivityKnowledge-ManagementMarkdownNotes10 APIs31.5NostrNostrDecentralized SocialOpen ProtocolRelays4 APIs30.6RaycastProductivityLauncherSDK3 APIs29.1JaegerDistributed TracingMicroservicesMonitoringObservability7 APIs28.8SPX GraphicsBroadcastGraphicsLive ProductionMedia5 APIs28.2QlikViewAnalyticsBusiness IntelligenceDashboardsData Discovery10 APIs27.7Blender3DAnimationGame DevelopmentModeling2 APIs27.2JupyterData ScienceEducationInteractive ComputingNotebooks12 APIs27.2
Emerging 16 Early or largely undocumented

APIs with this tag (112)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 12 Complete, well-documented, and agent-ready
HubSpot Calling Extensions APIThe calling extensions SDK enables apps to provide a custom calling option to HubSpot users directly from C...82.4HubSpot Timeline Events APIThe timeline events API enables technology partners to send custom event data from external systems into Hu...82.4HubSpot Video Conferencing APIThe video conferencing API enables you to integrate custom video conferencing solutions into HubSpot's meet...82.4Ada Integrations APIConnect external applications to Ada using OAuth to extend AI agent capabilities with partner-built integra...75.7Optimizely Extensions APIManage reusable extensions that encapsulate experiment logic and visual changes.75.1Adobe Launch Extensions APIManage extensions installed in event forwarding properties.74.7Dynatrace Extensions API 2.0The Dynatrace Extensions API 2.0 provides endpoints for managing monitoring extensions including uploading,...71.8Dynatrace Hub APIThe Dynatrace Hub API provides programmatic access to the Dynatrace Hub catalog content including apps, ext...71.8Outreach Client Extensions APIClient extensibility surface for embedding a web application inside the Outreach client — shell, tab and ti...70.5Tealium iQ Profiles APIProvides programmatic access to iQ Tag Management configuration, allowing retrieval and modification of tag...69.2Canva Apps SDKBuild apps that extend Canva's editor with custom functionality, content, and integrations.69.0Outlook Add-ins APIJavaScript API for building Outlook add-ins that extend Outlook functionality with custom features, using t...66.5
Strong 19 Solid coverage with minor gaps
Swell Apps PlatformSwell Apps extend the platform with custom data models (added fields or new entities), events (triggering f...65.8Bentley Systems Extensions APIExtensions resources for the iTwin Scenes API.64.1Confluence Dynamic Modules APIRegister and manage dynamic modules for Confluence Connect apps.63.7Confluence V2 App Properties APIStore and retrieve app-specific properties in Confluence using the v2 API.63.7Confluence V2 Custom Content APICreate and manage custom content types in Confluence using the v2 API.63.7GitHub Copilot Extensions APIPlatform for building Copilot Extensions that integrate third-party tools, services, and custom agents into...63.7Jane Extensions APICreate, read, update, delete, and list Jane Extensions, and browse the catalog of approved extensions avail...61.0Jane JDP APIJane JDP API from Jane — 31 path(s) described in OpenAPI.61.0Shopify Admin Extensions APIAdmin UI extensions allow developers to extend the Shopify admin with custom UI components. Extensions can ...60.4Shopify Checkout UI Extensions APICheckout UI extensions let app developers build custom functionality that merchants can install at defined ...60.4Shopify POS UI Extensions APIPOS UI extensions enable app developers to build custom functionality for Shopify Point of Sale. Extensions...60.4Webflow Designer Extension APIThe Webflow Designer Extension API allows developers to build extensions that run inside the Webflow Design...59.9Azure DevOps Extension Management APIAPI for managing extensions installed in an Azure DevOps organization. Enables programmatic listing, instal...58.3Docusign Connected Fields APIThe Docusign Connected Fields API enables developers to validate envelope field data programmatically. It a...58.2RingCentral Extensions APIThe Extensions API from RingCentral — 5 operation(s) for extensions.58.2RingCentral Provisioning APIThe RingCentral Provisioning API supports account, extension, user, phone-number, device, and role lifecycl...58.2Hyperbrowser Extensions APIUpload and list custom Chrome extensions that can be attached to browser sessions for advanced automation, ...56.4Office Add-ins PlatformPlatform for building solutions that extend Office applications including Excel, Outlook, Word, PowerPoint,...54.8Microsoft Dynamics NAV Extensions APIManage installed extensions54.5
Developing 24 Usable, with meaningful gaps to close
DroneDeploy Apps PlatformThe DroneDeploy Apps Platform lets third parties build embedded apps and serverless "functions" that run in...54.2AWS Lambda Extensions APIThe Lambda Extensions API enables you to create extensions that integrate with the Lambda execution environ...52.7Azure Virtual Machine Extensions REST APIREST API for managing Virtual Machine Extensions, which provide post-deployment configuration and automatio...52.7Browserbase Extensions APIThe Extensions API from Browserbase — 2 operation(s) for extensions.52.4Kernel Extensions APICreate, list, retrieve, and delete browser extensions.51.3SAP Lumira Discovery Extensions APIJavaScript API for creating custom visualizations and extensions in SAP Lumira.49.9Adobe UXP (Unified Extensibility Platform)The Unified Extensibility Platform (UXP) is Adobe's modern cross-app plugin development framework replacing...49.7Knostic extensions APIVS Code / IDE marketplace extensions with risk assessment49.7Anchor Browser Extensions APIThe Extensions API from Anchor Browser — 2 operation(s) for extensions.47.1Adobe Illustrator CEP Extensions APIThe Adobe Illustrator Common Extensibility Platform (CEP) allows developers to build panels and extensions ...46.3Adobe Illustrator Plugin SDKThe Adobe Illustrator Plugin SDK enables developers to build native C++ plug-ins for Illustrator on Windows...46.3Dataiku Plugin APIAPI for developing custom plugins that extend Dataiku DSS with custom datasets, recipes, processors, and we...45.8LambdaTest extensions APIThe extensions API from LambdaTest — 2 operation(s) for extensions.45.5Twitch Extensions APIManage and query extension information44.9Make Custom AppsThe Make Custom Apps platform enables developers to create their own applications for the Make automation p...42.9Commercetools Merchant Center Customizations APIThe commercetools Merchant Center Customizations API provides the programmatic interface for building custo...42.4Kernel Extensions APICreate, list, retrieve, and delete browser extensions.41.6Chrome Extensions APIAPIs for building Chrome browser extensions.41.4Docupilot extensions APIThe extensions API from Docupilot — 10 operation(s) for extensions.41.3Looker Extension Framework APIThe Looker Extension Framework provides APIs and SDKs for building custom extensions that run inside the Lo...41.3Zoho Cliq Extensions APIExtensions Module41.2Medusa Framework (Modules, Workflows, Routes)Server-side framework primitives for extending Medusa - custom API Routes, Modules with their own data mode...40.7OpenShift Console APIAPI for managing OpenShift web console extensions including ConsoleCLIDownload, ConsoleExternalLogLink, Con...40.2VS Code Marketplace Extensions APIQuery, search, and retrieve VS Code extensions from the Marketplace39.8
Thin 38 Limited public surface area
Tableau Extensions APIBuild dashboard extensions that enable users to interact with data from other applications directly in Tabl...38.8PagerDuty Extensions APIExtensions are representations of Extension Schema objects that are attached to Services.38.5Automation Anywhere Package SDKThe Automation Anywhere Package SDK is a Java-based development toolkit that enables developers to build cu...37.9Unity Platform APIThe Unity Cloud (Unity Platform) developer surface, documented publicly at docs.unitycloud.io as the Unity ...37.6SAP Ariba Flow Extension APIExtends workflow processing capabilities for custom procurement and sourcing processes.37.4Envoy API V3The Envoy API v3 is the current stable protobuf-based configuration and extension API for Envoy proxy. It d...37.3JupyterLab Extension APIJavaScript and TypeScript API used to build JupyterLab extensions and plugins. JupyterLab is composed of pl...37.2Qlik Extensions APIManages visualization extensions in Qlik Sense, allowing third-party visualizations and other presentation ...36.6TYPO3 REST API Extension (t3api)The sourcebroker/t3api extension provides an easy-to-configure REST API layer for TYPO3 Extbase models. API...36.6Helm PluginsThe Helm Plugins API defines the interface for extending the Helm CLI with additional subcommands. Plugins ...36.4SharePoint Framework (SPFx)The SharePoint Framework (SPFx) is a development model for building client-side web parts, extensions, and ...36.1Trello Power-UpsTrello Power-Ups are a framework for extending and integrating with the Trello platform. Power-Ups allow de...35.6Manifold Creator Core Smart ContractsOpen-source Solidity smart contract framework for deploying ERC721 and ERC1155 creator-owned NFT contracts....35.3Windstream Holdings extensions APIExtension management35.3Kittl SDK & App PlatformThe Kittl SDK is the bridge between a sandboxed app and the Kittl editor host. It exposes async namespaces ...35.2Porter Mixins APIExtension interface for building and using mixins, which are the building blocks for authoring Porter bundl...34.8Porter Plugins APIPlugin interface that allows extending Porter's core functionality, such as storing installation data, cred...34.8Fly.io Extensions APIThe Fly.io Extensions API is a provider-facing HTTP interface that enables third-party services to integrat...33.7Office Add-ins APIJavaScript API for building add-ins for Word, Excel, PowerPoint, and Outlook.33.3Craft eXtension APIThe Craft eXtension API is an official TypeScript/JavaScript SDK (@craftdocs/craft-extension-api) for build...33.2Excel JavaScript APIJavaScript API for building Excel add-ins and extensions.33.2Eclipse Marketplace APIREST API for accessing Eclipse Marketplace data including listings, categories, favorites, and installation...33.0Open VSX Registry APIREST API for the Eclipse Open VSX Registry, an open-source alternative to the Visual Studio Marketplace for...33.0MATLAB MEX APIBuild MEX functions that enable calling C, C++, and Fortran code from MATLAB, with support for both the C++...32.6Lucid Extension APIBuild extensions that run inside Lucidchart, Lucidspark, and Lucidscale editors. Read and modify canvas con...32.5Freshdesk App SDKThe Freshdesk App SDK allows developers to build custom applications that extend the functionality of the F...31.6Freshworks App SDKThe Freshworks App SDK enables developers to build custom applications and extensions that run within the F...31.6Penpot Plugin APIPenpot's Plugin API allows developers to build and publish custom extensions that extend the Penpot design ...31.6Obsidian Plugin APIIn-app TypeScript/JavaScript Plugin API for building Obsidian plugins. Plugins access the Vault, Workspace,...31.5Nostr Implementation Possibilities (NIPs)NIPs are the standards documents that extend Nostr beyond the core protocol. They define event kinds (text ...30.6Raycast Extension API (SDK)The primary developer interface - the @raycast/api npm package. A strongly typed TypeScript/Node SDK (insta...29.1Raycast StoreThe Raycast Store distributes community and partner extensions. Publishing is done via the `ray` CLI and a ...29.1Jaeger Remote Storage APIThe Jaeger Remote Storage API is a gRPC-based interface that allows extending Jaeger with custom storage ba...28.8SPX Graphics Extensions APIInvoke functions in custom SPX extensions28.2QlikView JavaScript APIJavaScript API library for building websites containing QlikView content and for developing custom extensio...27.7QlikView Plugin APICOM-based API for creating custom objects and extensions in QlikView.27.7Blender Extensions PlatformThe Blender Extensions Platform (extensions.blender.org) provides a curated repository of addons, themes, a...27.2JupyterLabNext-generation web-based interactive development environment for notebooks, code, and data, with a Jupyter...27.2
Emerging 19 Early or largely undocumented
Flow Extension APIEnriches processes and documents including purchase orders, invoices, ASNs, order confirmations, and receip...26.1SAP Ariba Custom Forms APIEnables creation and management of custom forms for extending procurement and sourcing processes with addit...26.1OpenInfra Foundation Extensions APIThe Extensions API from OpenInfra Foundation — 1 operation(s) for extensions.25.3Visual Studio Extensibility APIThe Visual Studio Extensibility API enables developers to create extensions that customize and extend Visua...21.4Visual Studio Marketplace APIThe Visual Studio Marketplace API provides access to the extension marketplace for Visual Studio, VS Code, ...21.4VS Code Extension APIThe VS Code Extension API enables developers to build extensions for Visual Studio Code. It provides APIs f...21.4WasmEdge Plugin SystemWasmEdge's plugin system enables extending the runtime with custom host function packages. Plugins can be d...21.3Better Auth PluginsFirst-party plugin ecosystem covering two-factor authentication, passkeys, magic link, organizations and te...20.9QRadar GUI App Framework APIAPI for developing and managing QRadar apps and extensions.20.7Enterprise Architect Add-In FrameworkFramework for building custom add-ins that extend Enterprise Architect with new functionality. Add-ins can ...20.5Celery Signals APISignals API for hooking into Celery lifecycle events including task, worker, beat, and consumer signals to ...19.6Safari Extensions APIAPI for building Safari Web Extensions that extend and customize the browsing experience.19.6Arc Chromium ExtensionsArc inherits the Chromium / Chrome Web Store extension model, so any Manifest V3 extension can be installed...18.0Thymeleaf Extras and DialectsAdditional Thymeleaf dialect extensions including the Java 8 Time dialect for date/time formatting, the Spr...17.8Amazon Web Services Extensions APIThe Extensions API from Amazon Web Services — 2 operation(s) for extensions.16.7Varnish Modules (VMODs)VMODs are extensions written for Varnish Cache that extend VCL capabilities. Bundled modules include blob (...16.4Higress Wasm Plugin APIThe Higress Wasm Plugin API provides a WebAssembly-based extension interface for developing and deploying c...14.7Visual Studio Live Share APIExtension-facing API (via the vsls npm module) that allows other VS Code and Visual Studio extensions to st...11.7Visual Studio Marketplace APIREST API for querying and retrieving Visual Studio and VS Code extensions, publishers, versions, and assets...11.7

Score breakdown

Frequency
59.7
log-scaled weighted occurrences
Breadth
2.7
spread across providers
Quality lift
50.2
mean composite of providers using it
Cohesion
12.2
strength of nearest seed neighbor

Related tags

Plugins 21 co-occurrences Customization 7 co-occurrences Add-Ins 6 co-occurrences JavaScript 18 co-occurrences Configuration 19 co-occurrences IDE 7 co-occurrences Profiles 11 co-occurrences Microsoft 9 co-occurrences

Where this tag comes from

Api tag111
Provider tag12
Openapi tag23
Openapi op tag96

Cohort brief

Auto-generated

The 97 providers in the APIs.io catalog tagged Extensions, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
97
all scored
Mean Kin Score
41.6
+20.9 vs catalog 20.7
Mean Agent Readiness
23.9
+14.2 vs catalog 9.7
Spread
11.7–82.4
median 38.5 · σ 16
How the 97 split by band
Exemplar 9Strong 13Developing 25Thin 34Emerging 16Minimal 0
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 50.9 17.5 +33.4 97
Developer Ergonomics 39.9 17.9 +22 97
Operational Transparency 31.8 11.3 +20.5 97
Access Clarity 40.3 22.3 +18 97
Contract Governance 14.7 6.4 +8.3 97
Discoverability 67.8 60.4 +7.4 97

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes
ArtifactThis cohortCatalogDifference
MCP server (any) 23% 16% +7
MCP server (first-party) 13% 7% +6
Agent Skills 0% 0% 0
OAuth scopes 29% 9% +20
Security 99% 88% +11
Arazzo workflows 24% 2% +22
Governance rules 62% 13% +49

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score
  1. 1 HubSpot 82.4
  2. 2 Ada 75.7
  3. 3 Optimizely 75.1
  4. 4 Adobe Launch 74.7
  5. 5 Dynatrace 71.8
  6. 6 Outreach 70.5
  7. 7 Tealium 69.2
  8. 8 Canva 69
  9. 9 Microsoft Outlook 66.5
  10. 10 Swell 65.8
Top by Agent Readiness
  1. 1 HubSpot 54.4
  2. 2 Confluence 50
  3. 3 Canva 49.1
  4. 4 Jane 48.4
  5. 5 Outreach 46.4
  6. 6 Microsoft Outlook 46
  7. 7 Webflow 45.5
  8. 8 Ada 43
  9. 9 RingCentral 41.4
  10. 10 GitHub Copilot 40.6
All 97 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 25 August 2026, across 26891 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

Work with this as data

Every tag here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for tags

7 MCP tools reach this
  • find_tagsBrowse and filter every tag in the catalog.
  • get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
  • cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
  • cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This tag
curl "https://apis.io/api/v1/tags/extensions"
All tags
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort
curl "https://apis.io/api/v1/cohorts/tag/extensions"
The distribution (Pro)
curl "https://apis.io/api/v1/cohorts/tag/extensions/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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